Sealed bearing



March 17, 1936. w N T Q 2,034,567

SEALED BEARING Filed Feb. 7, 1935 2 Sheets-Sheet J.

ESQ 17 INVENTOR.

5 Gustav Walleniin Fernsiriim BY 35 his ATTORNEY.

March 17, 1936. G. w. FERNS-TRCM 2,034,567

SEALED BEARING Filed Feb. 7, 1935 2 Sheets-Sheet 2 INVENTOR.

Gustav Wallenfin Fernstrfim his ATTORNEY.

. the bulges at the outer edge of the sealing plate Patented Mar. l 7,1936 STATES PAT I;

Gustav Wallentin Fernstriim, Goteborg, Sweden,

assignor to Aktiebolaget Svenska Kullageriabriken, Goteborg, Sweden, acorporation oi Sweden Application February I, 1935, Seriai No. 5,33%

This invention relates to sealed or enclosed bearings and has for anobject to provide a bearprovide a. bearing enclosure which will retainthe lubricant within the bearing for automatic application to the movingparts and which will effectively seal the lubricant containing chamber aainst escape of the lubricant.

vAnother object of the invention is to provide an encased bearing whichhas members designed for retaining lubricant within the bearing andforpreventing the entrance of foreign matter into the bearing.

Another object of the invention is to provide an improved form ofsealing or enclosing plate for a bearing, particularly an anti-frictionhear-- ing, which will afford an oil tight seal between itself and theouter race of the bearing, and which carries resilient securing meansand one which may be readily applied in position and securely attachedfor all practical purposes, which may be nevertheless, readily removedwithout injuring the race ringof the hearing by which it is car- In thedrawings which accompany this specification, one practicable embodimentof my invention is illustrated. I have shown sealing or encasing platesapplied to the outer race of a ball bearing, this at the present timebeing the preferred form of my invention, in which drawings Figure 1 isa section of the upper portion of a bearing embodying my invention,taken on an axial plane.

Figure 2 is an enlarged section of a portion of the outer race ring.

Figure 3 is an edge viewoi one of the enclosing or sealing platesdetached from the bearing, the direction of view being from inside thebearing outwardly.

Figure 4 is an axial section of the sealing plate taken at about theplane of the line 3- 5 in Figure 3 and its upper portion taken on thesameplane as is the plane shown at the right hand side in Figure 1. Y

Figureo is an enlarged edge view of one of and Figure 6 is also anenlarged detail view showing an axial section or" a portion of the plateat the bulge, these two latter details being shown in the same scale asis the detail shown in Figure 2. Figure 7 is a side view of the bearingshowing a sealing plate under the process of insertion.

One of the dimculties in designing a sealed. bearing is to obtain astructure which while being economical in manufacture and requiringsmall space, will still be easy to assemble and will effectively sealthe bearing, especially at the outer ring. If the outer ring, as thering i in the illustration, is the rotating member, the juncture betweenit and the sealing plates t-t is subjected to the pressure of thelubricant while thrown outwardly by centrifugal force. During times thatthe outer race is idle, either because the bearing is idle or the innerring ID is rotating, the joint between the outer race and the sealingplate is required at the bottom of the bearing to form the seal of anoil well.

In the present illustration, is shown my in vention, embodied in ananti-friction bearing wherein the outer race 5 and the inner race it areheld together by a row of balls it, spaced apart by a suitable cage it,the bearing being a deep groove ball bearing.

The outer ring i of the bearing shown in the revolve, is indicated bythe reference character l3.

The outer race ring 1 is formed with a circumferential groove it at eachside ofthe race way it for the balls it. inwardly these grooves haveplaln side walls it, the remainder of the groove 49 being circular inprofile.

The sealing plates or cups 8 are somewhat U shape in formation insection. There is what might be regarded as'the bottom or how H of theU. One of the side members it is shown .formed substantially straight inthe illustration,

and as cylindrical to conform to the cylindrical outer face of the'landit, formed on the inner race ring, The inner mrimeter oi this portion oithe plate is so tormed that it will have a running clearance relation asat Eltwith the outer perimeter of the land m. The other side member 22at and adjacent its outer edge ti is substantially cylindrical and is soformed that in assembling the bearings this edge ti freely passes theinner perimeter at of the outwardly of the groove l4. Outwardly of thisland 23, the side of the ring is preferably chamfered, a chamfer beingindicated at 24. The edge of the sealing plate is illustrated as formedwith a plurality of bulges 25, three being shown. These bulgespreferably extend outwardly a sufiicient distance beyond the radius ofthe land 23 that when the plate has been placed in position with itsedge 2| abutting the face IS, the bulge will not only prevent theaccidental displacement of the plate but by the spring action with whichits outer curved face 26 engages the outer face 21 of the groove [4, theresiliency or spring action of the parts will be such that the edge 2|of the plate throughout its entire circumference, including the edge 2|"of the bulge, is in oil sealing contact with the plain side wall IS. Thespace 28 between the side members l8 and 22 of the plates 8 of therespective sides of, the bearing form a grease chamber or lubricantchamber in connection with the inside of the bearing.

The sealing plates are inserted by springing the outer side member 22 inthe vicinity of one or more of the bulges sufiiciently to enable thebulges to pass through the opening defined by the perimeter of the land23. The manner in which the sealing plate is deformed is shown in Figure'7. The insertion of the sealing plates is facilitated by the chamfer 24which forces the bulges inwardly.

Preferably the bow portion ll of each of the plates 8 is well within theouter length dimensions of the inner ring ID of the bearing. That is theouter face of the bow I1 is, when the parts are properly assembled, wellwithin the planes of the ends 29 of such inner rings. If desired theinner ring may however be made of a width equal to that of the outerring.

It is the purpose of this invention to permit the manufacturer of thebearing to send it out containing a sufiicient supply of lubricant ofproper consistency, that it may be truly a bearing whichis lubricatedfor life. This is made possible by having a seal between the wall "5 ofthe outer ring and the edge of the plate 8 so continuously tight that itwill prevent the escape of any portion of the lubricant with which thebearing is supplied and to so locate and form the space 20 between theplate 8 and the inner race ring ID that the lubricant within will notseep-out. It is also necessary in many applications to prevent theentrance of various contaminating material to the bearing, among whichmay be mentioned oil or lubricant from other parts of the mechanism inwhich the bearing is mounted.

Although but one embodiment of my invention has been shown in thedrawings and herein described by way of illustration, yet it will beapparent that changes can be made within the limits of the claims whichwill not detract from the spirit of my invention.

Having thus described my invention, I claim and desire to secure byLetters Patent:

1. In a device of the character described, the combination with an innerrace ring for a bearing having extensions at the respective sides of itsrace way for the moving element, ofan outer race ring having extensionsat its sides much shorter than the extensions at the sides of the innerrace way, the outer ring being formed on each side with an outwardlyfacing plane wall and outwardly thereof with an inwardly facing cam, anda plate having a circumferential edge adapted to engage such plane wall,therebeing cam engaging means carried by the plate outwardly of its edgefor engaging the said cams and resiliently urging such edge against thesaid plane wall, each of the plates being U shaped in cross section.

2. In a device of the character described, the combination with an innerrace ring for a bearing having extensions at the respective sides of itsrace way for the moving element, of an outer race ring having extensionsat its sides much shorter than the extensions at the sides of the innerrace way, the outer ring being formed on each side with an outwardlyfacing plane wall and outwardly thereof with an inwardly facing cam, anda plate having a circumferential edge adapted to engage such plane wall,there being cam engaging means carried by the plate outwardly of itsedge for engaging the said cams and resiliently urging such edge againstthe said plane Wall, each of the plates being U-shaped in cross section,the bow of the U lying within the plane of the side face of the innerring.

3. In a device of the character described, the combination with an innerrace ring for a bearing having extensions at the respective sides of itsrace way for the moving element, of an outer race ring having extensionsat its sides much shorter than the extensions at the sides of the innerrace way, there being grooves formed in the outer race ring outwardly ofthe race track therein, each of such grooves having a plane inner radialwall, the outer wall of such groove being formed on a curve slanting inrelation to the axis of the ring, and a plate having a circumferentialedge adapted to engage such plane wall, there being a plurality ofbulges formed in the material of the plate at and outwardly of its edgefor engaging the cam face of the groove and resiliently urging such edgeagainst the said plane wall, each of the plates being U-shaped in cross'race track therein, each such groove having an outwardly facing Walland an inwardly facing wall cam face opposed to the outwardly facingwall and a cupped plate having an outer substantially cylindricalportion, a circumferential edge adapted to engage such outwardly facingwall, there being a plurality of bulges formed in the material of theplate at and outwardly of its edge for engaging the cam face of thegrooves and resiliently urging such edge against the said outwardlyfacing wall.

5. In a device of the character described, the combination with an innerrace ring for a bearing having extensions at the respective sides of itsrace way for the movingelement, of an outer race ring having extensionsat its sides, the outer ring being formed on each side with an outwardlyfacing substantially plane wall and outwardly thereof with an inwardlyfacing cam, and a plate having a bent over circumferential edge inengagement with the outwardly facing wall of the groove, there being camengaging means carried by the plate outwardly of such edge, engaging theing substantially plane wall and outwardly thereof with an inwardlyfacing cam, and a plate formed with a substantially cylindrical portionhaving a circumferential edge in engagement with the outwardly facingwall of the groove, there being cam engaging means carried by the plateoutwardly of such edge engaging the said cam and resiliently urging suchedge against the said groove wall.

'7. In a bearing structure, the combination with a bearing ring formedon its inner perimeter with a raceway for moving bearing elements, thering having an extension at one side of the raceway, there being agroove formed in the inner perimeter of the extension leaving a landoutwardly of the groove, it being of greater diameter than is thediameter of the land inwardly of. the groove, the inner wall surface ofthe groove facing outwardly toward the side of the ring, of a platehaving a bent over circumferential edge in engagement with the outwardlyfacing wall of the groove and engaging means carried by the plateoutwardly of such edge for engaging the inwardly directed face of thegroove and holding such edge against the said outwardly facing wall.

8. In a bearing structure, the combination with a bearing ring formed inits inner perimeter with a raceway, having extensions at the sides formoving bearing elements, the ring having an extension on at least oneside of the raceway, there being a groove formed in the inner perimeterof each extension leaving a land outwardly of the groove, it being ofgreater diameter than is the diameter of the land inwardly of thegroove, the inner wall surface of the groove facing outwardly toward theside of the ring, of a plate having a bent over circumferential edge inengagement with the outwardly facing wall of the groove and engagingmeans carried by the plate outwardly of such edge for engaging theinwardly directed face of the groove and holding such edge against thesaid outwardly facing wall.

9. In a bearing structure, the combination with a bearing ring formed onits inner perimeter with a raceway for moving bearing elements, the ringhaving an extension on one side of the raceway, there being a grooveformed in the inner perimeter of the extension leaving a land at eachside of the groove, the land outwardly of the groove being of greaterdiameter than is the diameter of the land inwardly of the groove, theinner wall surface of the groove facing outwardly toward the side of thering, of a plate having a bent over circumferential edge in engagementwith the outwardly facing wall of the groove and engaging means carriedby the plate outwardly of such edge for engaging the inwardly directedface of the groove and holding such edge against the said outwardlyfacing wall.

GUSTAV WAILENTIN S'I'RbM.

